Finding the Fourth Proportional to 172,413, 258,619.56 and 54,093.60

Step by Step Solution

1. Step 1: Write the proportion equation
   172,413 : 258,619.56 = 54,093.60 : x
2. Step 2: Convert to fraction form
   172,413/258,619.56 = 54,093.60/x
3. Step 3: Cross multiply
   172,413x = 258,619.56 × 54,093.60
4. Step 4: Simplify right side
   172,413x = 13,989,663,030.82
5. Step 5: Solve for x
   x = 13,989,663,030.82/172,413
6. Step 6: Final answer
   x = 81,140.42